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<p>Hey y'all,</p>
<p>I am making a voltage controlled bipolar mixer, so I need a
bipolar i.e. 4-quadrant VCA. So 2 channels mixing together with
bipolar voltage control. Here is what I am thinking:<br>
<b><a class="moz-txt-link-freetext" href="http://www.synthdiy.eu/files/BipolarVCA.png">http://www.synthdiy.eu/files/BipolarVCA.png</a></b><br>
A rectifier circuit will drive the 13700 Iabc port and a
comparator will drive the switch. <br>
</p>
<p>I know I could use AD633s but they are really pricey. Any other
clever ways of pulling this off?<br>
<b></b></p>
<pre class="moz-signature" cols="72">--
--Tim Ressel
Circuit Abbey
<a class="moz-txt-link-abbreviated" href="mailto:timr@circuitabbey.com">timr@circuitabbey.com</a></pre>
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